Behavior-preserving cleanup of AI-generated code smells in 5 files authored/moved by this PR:
- src/hooks/model-fallback/fallback-state-controller.ts (-47/+47 net reorganization, redundant defensiveness removed)
- src/shared/model-string-parser.ts (-4 LOC obvious-comment cleanup)
- src/shared/ripgrep-cli.ts (-13 LOC obvious comments + redundant defensive checks)
- src/tools/delegate-task/tool-description.ts (-6 LOC)
- src/tools/look-at/look-at-input-preparer.ts (-6 LOC)
Targets: obvious comments that restate code, over-defensive null checks on guaranteed values, redundant existence checks. No public API signatures changed, no type hints removed, no new abstractions introduced. Full test suite still passes.
Hoist shared ripgrep CLI resolution helpers (resolveGrepCli, resolveGrepCliWithAutoInstall, GrepBackend, DEFAULT_RG_THREADS, ResolvedCli) out of src/tools/grep/constants.ts into src/shared/ripgrep-cli.ts so they no longer straddle two sibling tool directories.
Before: src/tools/glob/constants.ts re-exported from src/tools/grep/constants.ts, violating the project's "tools should not import from sibling tools" rule enforced by .sisyphus/rules/modular-code-enforcement.md.
After: both src/tools/glob/ and src/tools/grep/ consume the shared helpers from src/shared/ripgrep-cli.ts. src/tools/grep/constants.ts keeps only the grep-specific UI-exposed constants.
YeonGyu-Kim